Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'void rez(int)': main.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++){ ~^~~~~~~~~~~~ main.cpp:42:23: warning: 'im' may be used uninitialized in this function [-Wmaybe-uninitialized] nrd[im]+=nrd[x]; ^